256470105439 has 2 divisors, whose sum is σ = 256470105440. Its totient is φ = 256470105438.

The previous prime is 256470105403. The next prime is 256470105467. The reversal of 256470105439 is 934501074652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256470105439 - 2²⁷ = 256335887711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256470105239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128235052719 + 128235052720.

It is an arithmetic number, because the mean of its divisors is an integer number (128235052720).

Almost surely, 2^256470105439 is an apocalyptic number.

256470105439 is a deficient number, since it is larger than the sum of its proper divisors (1).

256470105439 is an equidigital number, since it uses as much as digits as its factorization.

256470105439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 256470105439 in words is "two hundred fifty-six billion, four hundred seventy million, one hundred five thousand, four hundred thirty-nine".